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Mortgage Repayment Calculator

Plan Ahead

See your monthly repayment before you apply. Knowing your payment upfront helps you assess affordability and work out whether you need to adjust your deposit, term or target property price.

Calculate Accurately

Enter your loan amount, interest rate and term to get an accurate monthly repayment figure. Adjust any variable to compare different mortgage scenarios side by side.

Secure Your Move

Understanding your monthly repayment gives you confidence in your application and helps you work out how much overpaying each month would reduce your overall interest cost.

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Your mortgage details
£
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Use your lender's quoted rate
years
Your Repayment Estimate

Based on a capital and interest repayment calculation

Monthly Repayment
£0.00
Total Interest Charged
£0
Total Amount Repaid
£0
This calculator is for illustrative purposes only and does not constitute financial advice. Actual mortgage rates and configurations depend on individual circumstances. YOUR HOME MAY BE REPOSSESSED IF YOU DO NOT KEEP UP REPAYMENTS ON YOUR MORTGAGE.
Understand Your Repayments

How Is a Mortgage Repayment Calculated?

A mortgage repayment is made up of two parts: the capital (the amount you borrowed) and the interest your lender charges. On a standard repayment mortgage, each monthly payment reduces your outstanding balance as well as covering the interest, so you owe nothing at the end of the term.

Capital and Interest On a repayment mortgage, your monthly payment splits between paying off the loan itself and covering the interest that has accrued. In the early years, most of your payment goes towards interest rather than capital. This shifts over time as your outstanding balance reduces, so more of each payment goes towards the loan and less towards interest. By the end of the term, you own the property outright.

How the Interest Rate Affects Your Payment Even a small change in interest rate makes a meaningful difference to your monthly repayment. On a £200,000 mortgage over 25 years, the difference between a 4% and a 5% rate is around £100 per month. Because mortgage rates change regularly and each lender prices risk differently, it is worth comparing whole-of-market options rather than accepting the first rate you are offered.

Fixed Rate vs Variable Rate With a fixed-rate mortgage, your monthly repayment stays the same for the duration of the fixed period, typically two, three or five years. With a variable or tracker rate, your repayment moves as the Bank of England base rate changes. Fixed rates give certainty; variable rates can save you money if rates fall but expose you to increases if they rise. Most borrowers choose fixed rates for the predictability they offer.

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